topic Re: Convert string to parameter name in GDL

Convert string to parameter name

silvermat — Wed, 15 Jan 2025 07:51:03 GMT

Hello everyone!

I'm new in gdl programing and I need your help.

Is there any way to convert string into parameter name?

I want to generate variable names with "for loop" (cell_1_1, cell_1_2, cell_2_1, cell_2_2 and go on) and next use them to render text paragraphs as value of that parameters.

Re: Convert string to parameter name

Lingwisyer — Wed, 15 Jan 2025 07:59:27 GMT

Have you considered using an array instead? Your naming suggests the concept of an array. Then you can just step the row.

Also, what do you mean by "as value of that parameter"? They are empty or generated based on some naming logic? If you are using the naming you have suggested to generate values, even more reason to your an array.

Ling.

Re: Convert string to parameter name

silvermat — Wed, 15 Jan 2025 08:15:46 GMT

I tried something like that:

Is array can handle it?

! Parametry podstawowe dx = cell_width ! Szerokość komórki dy = cell_height ! Wysokość komórki define style{2} "JA_font_style_1" Arial, gs_font_size*5, 1 style "JA_font_style_1" result = 1 ! Rysowanie siatki tabeli for r = 1 to row_num for c = 1 to col_num ! Pozycje wierzchołków komórki x1 = (c - 1) * dx y1 = (r - 1) * dy x2 = c * dx y2 = r * dy pen cell_pen poly2 4, 5, x1, -y1, x2, -y1, x2, -y2, x1, -y2 ! Generowanie nazwy parametru param_name = "cell_" + str(c, 1, 0) + "_" + str(r, 1, 0) ! Pobranie wartości parametru za pomocą request content = "" result = request("parameter", param_name, content) ! Jeśli parametr istnieje i ma wartość if result < 1 & content = "" then ! Tworzenie paragrafu paragraph "para_" + param_name 1, 0, 0, 0, 1 pen text_pen style "JA_font_style_1" ! Zapisujemy faktyczną wartość parametru content endparagraph ! Tworzenie tekstbloku textblock "block_" + param_name 0, 7, 0, 1, 1, 0, "para_" + param_name ! Wyświetlenie tekstu w środku komórki richtext2 x1 + dx / 2, -y1 - dy / 2, "block_" + param_name endif next c next r

Re: Convert string to parameter name

Lingwisyer — Wed, 15 Jan 2025 08:44:49 GMT

So your user defines a table size, and your object draws said table and populates the cells with user defined values. Array type parameters can be used for this, and you can get it to populate to as many rows and columns as you want. Given your parameter values reflect the position within the table, it should be relatively simple to generate those too. You will also need to utilise the GLOB_MODPAR_NAME command if you want the array size to be dynamic.

*Actually, I'm not sure how you would STEP letters without resorting to manually relating each number to a letter.

Re: Convert string to parameter name

runxel — Wed, 15 Jan 2025 09:38:58 GMT

You can not access parameters by string reference. GDL has no concept of that. It always needs to be by literal.

Some commands allow the use of strings, but those commands are mostly in the UI (see the difference between ui_infield{2} and ui_infield{3} as an example).

But in other contexts this is not possible.

! cell_1 => param with value of '1.5' pname = "cell_1" result = pname + 2.5 ! ERROR

Here "pname" is just a string with the content of "cell_1". It is not a reference to the parameter with that name.

I suggest using variable sized Arrays as well.